Sash-fastener.



B. G. DUNBAR.

SASH FASTENER. AP'PLIGATION FILED MAY 21. 1913.

1,072,839, Patented Sept. 9, 1913.

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\ BENJAMDT Gr- DUNBAR, 0F SANDOVAL, l-.ILINO'S- terasse.

To all whom t may concern:

Be it known that l, BENJAMIN Gr. DUN- Ban, eitiaen nf the United States, residing at Sandoval, in the county of Marion State of Illinois, have invented certain new and useful Improvements in Sash-Fasteners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invent-ion has relation to improvements in sash-fasteners; and it consists in the novel details of construction more fully set forth in the specification and pointed out in the claim.

In the drawings, Figure l is an elevation of a window-frame and sash, looking at the same from the inside of the room, showing my invention applied thereto; Fig. 2 is an enlarged front elevation of a portion of the window sash showing my invent-ion with parts broken away; Fig. 3 is a vertical section on line 3--3 of Fig. 2; Fig. 4 is an enlarged horizontal section on line 4--4 of Fig. 9.; and Fig. 5 is an edge view of the window-sash withV my invention applied thereto.

The object of my invention is to provide a fastener for window-sashes which will prevent either an upward or downward movement of the sash or lock the same against movement in either direction if desired, thereby permitting the window to be locked at any position.

A further object is to provide a fastener which may be convenient-ly and easily operated with one hand if desired.

Other advantages will be better apparent from a detailed description of my invention which is as follows:

Referring to the drawings, S, S', represent the window-sashes adapted to slide in the frame F usual. Placed at any suitable location o-n the vertical edge of the sash S (or S) is a pocket or casing l, containing the several parts presently to be de` scribed. The casing l is sunk flush with the surface of the sash S so as not to hinder the latter as it slides in the frame F. Securely fixedbetween the casing l and its cover plate 2 are the pins 3, 3, upon which are mounted the cam-catches or dogs 4, 4. The dogs 4, 4, are provided with teeth t, t, which are pointed so as to grip in opposite directions as is apparent from the drawing (Fig. 2). Pins 5, 5, are also iiXed between Specification of Letters Patent.

Applicatqn filed Mey 21, 191.3-

SASH-FASTENEB.

Batented Sept. 9, 191 3,-. .Serial N0.- ?6.S,i89- l the casing l and the cover-plate 2 and have the springs 6, 6, mounted upon them. The arms of the springs 6, f6, are adapted to bear against the casing wall and the dogs 4, 4, respectively, thereby forcing the latter toward the window-frame F. The cover-plate 2 of t-he casing is provided with slots s, s, through which pass the outwardly bent ends 7, 7, of the links 7, 7. The lmobs 8, 8, are secured to the outwardly bent ends 7, 7 of t-he links 7, 7, while the opposite ends of the links are pivotally secured-to the dogs 4, 4. At the ends of the slots s, s, farthest from the dogs 4, 4, are the recesses r, r, in which the bent ends 7, 7, of the links 7, 7, rest when the dogs are in their normal positions, that is to say, out of gripping engagement with the frame F.

The operation of my invention may be described as follows :-It will be observed that the spring 6, 6, tend to keep the dogs forced against the frame F in which position the window-sash is effectively locked against any movement. Now it may be desired to open the lower sash of the window (as lshown dotted in Fig. l) and lock it against any further downward movement, although allowing it freedom to be opened farther. Then the dogs would be in the positions shown in Fig. 2, the upper one being released by disengaging the link 7 from its recess 7", and bearing against the frame F, while the lower one would be drawn in by means of the link 7 whose portion 7 rests in its recess r. It is therefore apparent that when both links 7, 7, are held in place by their respective recesses r, r, beth dogs are clear of the window-frame leaving the sash free to move in either direction. On the other hand the sash can be locked against movement, either up or down or both by simply releasing t-he proper link 7 from its recess r and the spring 6 will force the corresponding dog against the frame F.

ln the drawings, only the bottom sash is provided with a catch but obviously the top sash can also be so provided to advantage.

Having described my invent-ion, what I claim is ln combination with a window-frame and sash therefor, a pocket being formed in the sash opposite the frame, a serrated cam or dog mounted pivotally in said pocket and oscillatable toward the frame te cause the teeth thereof to grip the surface of the frame, a spring mounted between the dog and inner Wall of the pocket and provided With arms respectively engaging the inner Wall of the dog and the opposite Wall of the pocket, a link having one end pivotally 5 secured to the dog at a point removed from the hinge axis of the latter7 a cover plate for the pocket provided With a slot terminating in a lateral recess at the end farthest from the Window-frame, an o-ut- 10 Wardly bent terminal being` formed on the link at theV opposite end thereof for engaging said recess and for traversing the slot, the parts operating' substantially as set forth. f jf, In testimony whereof I aHiX my signature, A15 n presence ,of tWo Witnesses.

Y BENJAMIN G. DUNBAR.

Witnesses:

EMIL STAREK, Jos. A. MICHEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

